Perhaps you should try some spelling variations:
sach thueu » sach thieu, sach thue
sach thu » sach thue, sach thieu, sach tham
dan lam » van lam, dan lap, dan nam
hanh xa » hanh va, hanh ma, hanh xu
va dan » ca dan, va dao, va dau
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
lam va » nam va, dam va, lam ha
thiet » thieu

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 thu) or (sach thueu)) hanh xa hoi. hieu ((ve cac) or (va cam)) tuc va dan lam va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thueu)) hanh xa hoi. hieu ((ve cac) OR (va cam)) tuc va dan lam va thiet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thueu)) hanh xa hoi. hieu ((ve cac) or (va cam)) tuc va dan lam va thiet*.