Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
bang hoi » bang hai, bang hoc, quang hoi
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
ba bang » va bang, ba bong, ba lang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
hoi cua » hoi chuc
cam tuc » cam xuc, cam tu, nam thuc
tuc ba » tuc bao, tuc xa, tuc va
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc ba bang hoi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc ba bang hoi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc ba bang hoi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc ba bang hoi cua tu*.