Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hang hai » hoang hai, hang tai, thanh hai
tu sach » thu sach, su sach, te sach
cao suc » cao su, cao duc
nang xa » nang x, lang xa, nang ma
cam duc » cao duc, pham duc, nam duoc
hai cua » thai cua, dai cua, hoi cua
va hang » van hang, va nang, va lang
cua tu » cua tuc, cua su, cua cu
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu van ((((cam duc) or (cam xuc))) or (cao suc)) va hang hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van ((((cam duc) OR (cam xuc))) OR (cao suc)) va hang hai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van ((((cam duc) or (cam xuc))) or (cao suc)) va hang hai cua tu*.