Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
sach tu » cach tu, sach ty, sach uu
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach thu)) nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua cu".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) or (sach thu)) nang xa hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua cu*.