Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi cua
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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: doc ((sach y) or (sach tu)) nang x hoi. hieu ve cam xuc van hanh ((vi cua) or (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach y) OR (sach tu)) nang x hoi. hieu ve cam xuc van hanh ((vi cua) OR (doi cua)) tre.
• Adding a wildcard symbol may retrieve word variants: doc ((sach y) or (sach tu)) nang x hoi. hieu ve cam xuc van hanh ((vi cua) or (doi cua)) tre*.