Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
thanh lap » thanh san, thanh hai, thanh van
phan lap » phan dau
cam truc » cau truc, nam truc, lam truoc
hieu van » hieu va, thien van, lieu va
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
te sach » toc sach
y nang » ly nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) OR (ky nang)) ma hoi. hieu van cam truc va ((thanh lap) or (phan lap)) chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) ma hoi. hieu van cam truc va ((thanh lap) OR (phan lap)) chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ky nang)) ma hoi. hieu van cam truc va ((thanh lap) or (phan lap)) chat triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ky nang)) ma hoi. hieu van cam truc va ((thanh lap) or (phan lap)) chat triet*.