Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, le thanh
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va tinh » may tinh
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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 ma hoi. hieu van cam tuc ((va thanh) OR (va tinh)) san ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu van cam tuc ((va thanh) OR (va tinh)) san ((cuu tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu van cam tuc ((va thanh) OR (va tinh)) san ((cuu tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu van cam tuc ((va thanh) OR (va tinh)) san ((cuu tre) or (su triet))*.