Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach thi » sach thu, sach tai, sach thieu
hanh lam » thanh lap, hanh kem, dinh lam
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
hanh xa » hanh ma, hanh xu, canh 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 thi ((hanh xa) or (hanh va)) hoi. hieu ((ve cam) or (vien cac)) tuc van hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi ((hanh xa) OR (hanh va)) hoi. hieu ((ve cam) OR (vien cac)) tuc van hanh lam va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi ((hanh xa) or (hanh va)) hoi. hieu ((ve cam) or (vien cac)) tuc van hanh lam va triet*.