Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
kham tuc » nham thuc, pham thuc, kham cuoc
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
dan dau » danh dau, doan dau, van dau
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
tuc ca » tuc cac, tuc cua, tuc xa
ca dan » cac dan, ca dao

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) OR (toc sach)) ky nang ma hoi. hieu vu kham tuc ca dan dau cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky nang ma hoi. hieu vu kham tuc ca dan dau cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang ma hoi. hieu vu kham tuc ca dan dau cua tre*.