Perhaps you should try some spelling variations:
chau tho » chat thom, cau thi, phu tho
chau tre » chay tren, cho tre, cau tra
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
ve cham » va cham, ve chat, vu cham
ve cam » ve cac, va cam, ve cai
x hoi » xa hoi, o hoi, x ho

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 tu nang x hoi. hieu ((ve cam) or (ve cham)) luc van hanh lai ((chau tre) or (chau tho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang x hoi. hieu ((ve cam) OR (ve cham)) luc van hanh lai ((chau tre) OR (chau tho)).
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang x hoi. hieu ((ve cam) or (ve cham)) luc van hanh lai ((chau tre) or (chau tho))*.