Perhaps you should try some spelling variations:
doan dau » doan dieu, phan dau, doan va
kham tuc » nham thuc, pham thuc, kham cuoc
te sach » toc sach
hieu va » lieu va, hieu qua
dau cua » dai cua, day cua, cau cua
va doan » va doanh, van doan, va dan
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu vu » hieu su, dieu vu, hieu qua
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, tuc xa
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 ky nang ma hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) kham tuc va doan dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. ((hieu vu) OR (((hieu ve) OR (hieu va)))) kham tuc va doan dau cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) kham tuc va doan dau cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. ((hieu vu) or (((hieu ve) OR (hieu va)))) kham tuc va doan dau cua tre*.