Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
phan lap » phan dau
hanh lam » thanh lap, hanh kem, hanh va
hieu van » hieu va, thien van, lieu va
van bac » van ban, van bao, van hac
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) OR (nang ma)) 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 sac ky ((nang xa) OR (nang ma)) hoi. hieu van bac xuc va ((hanh lam) OR (phan lap)) chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (nang ma)) hoi. hieu van bac xuc va ((hanh lam) or (phan lap)) chat triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (nang ma)) hoi. hieu van bac xuc va ((hanh lam) or (phan lap)) chat triet*.