Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
hieu van » hieu va, thien van, lieu va
hanh lam » thanh lap, hanh kem, hanh va
phan lap » phan dau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
xuc va » duc va, tuc va, luc 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 ky nang xa hoi. hieu van bac xuc va ((hanh lam) or (phan lap)) chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu van bac xuc va ((hanh lam) OR (phan lap)) chat triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu van bac xuc va ((hanh lam) or (phan lap)) chat triet*.