Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
phan duc » pham duc, phan tu, phan dau
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
nang mai » nang ma, nang tai, lang mai
tay nang » tay nung, may nang, day nang
hieu ke » hieu kem, chieu ke, hieu ky
ke phan » ve phan, kenh phan, ke thang
mai hoi » mai khoi, dai hoi, lai hoi
san tay » ban tay, dan tay, han tay
va hanh » van hanh, ban hanh, dao hanh
va danh » va dinh, va dan, dia danh
vi su » va su, ve su, ki su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san tay nang mai hoi. hieu ke phan duc ((((va danh) OR (va hanh))) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san tay nang mai hoi. hieu ke phan duc ((((va danh) OR (va hanh))) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san tay nang mai hoi. hieu ke phan duc ((((va danh) OR (va hanh))) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: thuat san tay nang mai hoi. hieu ke phan duc ((((va danh) OR (va hanh))) or (va thanh)) vi su triet*.