Perhaps you should try some spelling variations:
kham truc » nham thuc, pham thuc, kham trai
cua tre » cuu tre, cua triet, dua tren
dan dau » danh dau, doan dau, van dau
truc va » thuc va, thuc vat, trung va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
nang ma » tang ma, sang ma, nang cao
va dan » ca dan, va dao, va dau
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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 ky nang ma hoi. ((hieu va) or (hieu qua)) kham truc va dan dau ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. ((hieu va) OR (hieu qua)) kham truc va dan dau ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. ((hieu va) or (hieu qua)) kham truc va dan dau ((cua tre) OR (cua te))*".