Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
thi van » thi lan, thi hanh, thi nang
lam lo » nam lo, lam co, cam lo
lo van » le van, vo van, so van
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vay khach)) ky lang xa hoi. ((thien van) OR (thi van)) lam lo van hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vay khach)) ky lang xa hoi. ((thien van) OR (thi van)) lam lo van hanh dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vay khach)) ky lang xa hoi. ((thien van) OR (thi van)) lam lo van hanh dai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vay khach)) ky lang xa hoi. ((thien van) OR (thi van)) lam lo van hanh dai cua tu*.