Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
phan duc » pham duc, phan tu, phan dau
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ke » hieu kem, chieu ke, hieu ky
ty nang » ky nang, ty xang, ty hang
va danh » va dinh, va dan, va hanh
ke phan » ve phan, kenh phan, ke thang
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: ((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ke phan duc ((va danh) or (va thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ke phan duc ((va danh) OR (va thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ke phan duc ((va danh) or (va thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ke phan duc ((va danh) or (va thanh)) vi su triet*.