Perhaps you should try some spelling variations:
chua tre » chua tri, cua tre, chua trieu
hieu van » thien van, lieu va, hieu ve
cam luc » cam xuc, cau luc
va chua » vua chua, ca chua, va chu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
sinh v » sinh va, sinh y
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sinh v) OR (sinh vat)) nang xa hoi. ((hieu va) or (hieu van)) cam luc va hanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sinh v) OR (sinh vat)) nang xa hoi. ((hieu va) OR (hieu van)) cam luc va hanh va chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sinh v) OR (sinh vat)) nang xa hoi. ((hieu va) or (hieu van)) cam luc va hanh va chua tre".
• Adding a wildcard symbol may retrieve word variants: hoc ((sinh v) OR (sinh vat)) nang xa hoi. ((hieu va) or (hieu van)) cam luc va hanh va chua tre*.