Perhaps you should try some spelling variations:
kham tuc » nham thuc, pham thuc, kham cuoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
dau dai » sau dai, dau da, dau hai
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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 tang ma hoi. hieu vu kham tuc va ((dau dai) or (dat dai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang ma hoi. hieu vu kham tuc va ((dau dai) OR (dat dai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky tang ma hoi. hieu vu kham tuc va ((dau dai) or (dat dai)) cua tre*.