Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hieu quan » lieu quan, thien quan, lien quan
hanh lai » hanh lam, hanh tai, thanh lap
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
sach ty » sach y, sach tu, sach thu
hac xuc » chat xuc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (lang xa)) hoi. ((hieu quan) or (hieu qua)) hac xuc va hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. ((hieu quan) OR (hieu qua)) hac xuc va hanh lai chau triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang xa)) hoi. ((hieu quan) or (hieu qua)) hac xuc va hanh lai chau triet*.