Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
te sach » toc sach
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vi cua » vai cua, di 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 (doc sach)) ty nang xa hoi. hieu va tham xuc ((va hang) OR (va nang)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ty nang xa hoi. hieu va tham xuc ((va hang) OR (va nang)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (doc sach)) ty nang xa hoi. hieu va tham xuc ((va hang) OR (va nang)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ty nang xa hoi. hieu va tham xuc ((va hang) OR (va nang)) vi cua te*.