Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban thanh » ban hanh, ban hang
thuc ban » thuoc ban, thuc dan, thu ban
cam thuc » am thuc, nam thuc, cam thu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
te sach » toc sach
va cam » va cham, va cac, va cao
vi su » va su, ki su, oi su
ve su » va su

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 (thuat sach)) ky nang xa hoi. hieu va cam thuc ban thanh ((vi su) OR (ve su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat sach)) ky nang xa hoi. hieu va cam thuc ban thanh ((vi su) OR (ve su)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat sach)) ky nang xa hoi. hieu va cam thuc ban thanh ((vi su) OR (ve su)) triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat sach)) ky nang xa hoi. hieu va cam thuc ban thanh ((vi su) OR (ve su)) triet*.