Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
va trien » va truyen, va thiet, va tuyen
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thieu, sach tham, cach thuc
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
lam va » nam va, dam va, lam ha
ve cam » ve cham, ve cac, va cam

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 thue)) hanh xa hoi. hieu ve cam ((xuc va) or (tuc va)) hanh lam va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) hanh xa hoi. hieu ve cam ((xuc va) OR (tuc va)) hanh lam va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) OR (sach thue)) hanh xa hoi. hieu ve cam ((xuc va) or (tuc va)) hanh lam va trien".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) OR (sach thue)) hanh xa hoi. hieu ve cam ((xuc va) or (tuc va)) hanh lam va trien*.