Perhaps you should try some spelling variations:
thien van » thi van
dua tren » dung tren
hieu van » hieu va, lieu va, hieu ve
hang doi » hang di, hang loi, huong doi
va hang » van hang, va nang, va lang
cu tren » tu tren
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((hieu van) or (thien van)) cam tuc va hang doi ((cu tren) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu van) OR (thien van)) cam tuc va hang doi ((cu tren) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu van) or (thien van)) cam tuc va hang doi ((cu tren) or (dua tren))*.