Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh ve, nhanh vi
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa
ha hoi » hoa hoi, ha noi, xa hoi
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: tu cac ky dang ha hoi. hieu van cam tuc va ((thanh vi) OR (thanh va)) ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky dang ha hoi. hieu van cam tuc va ((thanh vi) OR (thanh va)) ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky dang ha hoi. hieu van cam tuc va ((thanh vi) OR (thanh va)) ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang ha hoi. hieu van cam tuc va ((thanh vi) OR (thanh va)) ((dua tren) or (cua te))*.