Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
tuc va » thuc va, truc va, tuc xa
su van » tu van, vu van
va cam » va cham, va cac, va cao
su va » tu va

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) or (thu hoach)) ky lang ha hoi. hieu va cam tuc va hanh ((su va) or (su van)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu hoach)) ky lang ha hoi. hieu va cam tuc va hanh ((su va) OR (su van)) trien.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu hoach)) ky lang ha hoi. hieu va cam tuc va hanh ((su va) or (su van)) trien*.