Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
doan van » doan va, hoang van, luan van
cua tre » cua te, cuu tre, cua triet
van cua » vang cua, ban cua, dan cua
van hai » van ha, van chat, van hanh
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, tuc xa
te sai » te bai, te lai, te hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) OR (te tai)) ky dang xa hoi. hieu van hai ((thuc vat) or (tuc va)) doan van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te tai)) ky dang xa hoi. hieu van hai ((thuc vat) OR (tuc va)) doan van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) OR (te tai)) ky dang xa hoi. hieu van hai ((thuc vat) or (tuc va)) doan van cua tre*".