Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, dinh lam
van hanh » van thanh, ban hanh, van anh
sach thi » sach thu, sach tai, sach thieu
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
hanh va » hang va, hanh vi
hanh xa » hanh ma, hanh xu, canh xa
hieu va » hieu qua
lam va » nam va, dam va, lam ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thi ((hanh xa) OR (hanh va)) hoi. ((hieu va) or (lieu va)) cam tuc van hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi ((hanh xa) OR (hanh va)) hoi. ((hieu va) OR (lieu va)) cam tuc van hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi ((hanh xa) OR (hanh va)) hoi. ((hieu va) or (lieu va)) cam tuc van hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: su sach thi ((hanh xa) OR (hanh va)) hoi. ((hieu va) or (lieu va)) cam tuc van hanh lam va triet*.