Perhaps you should try some spelling variations:
thang dau » hang dau, xang dau, thanh dat
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
ke thang » ke trang, le thang, ke thuong
sach ty » sach y, sach tu, sach thu
va danh » va dinh, va dan, dia danh
vu sach » vu bach, su sach, vu khach
hieu ke » hieu kem, chieu ke, hieu ky
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
va hanh » van hanh, ban hanh, dao hanh
ki su » ky su

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

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