Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ha » hieu hoa, hieu va, hieu ca
di cua » dai cua, doi cua, de cua
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) or (thu sach)) ky nang xa hoi. hieu ha nam thuc ((ban hanh) or (van hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky nang xa hoi. hieu ha nam thuc ((ban hanh) OR (van hanh)) di cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky nang xa hoi. hieu ha nam thuc ((ban hanh) or (van hanh)) di cua te*.