Perhaps you should try some spelling variations:
dua tren » dung tren
hieu ve » hieu va, hieu van
lua tre » cua tre, luy tre, luat tri
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
cac xuc » cam xuc, cac nuoc, chat xuc
te sach » toc sach
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
xuc va » duc va, tuc va, luc va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ly nang) OR (ly hang)) x ho. hieu ve cac xuc va doan vi ((lua tre) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ly hang)) x ho. hieu ve cac xuc va doan vi ((lua tre) OR (dua tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) OR (ly hang)) x ho. hieu ve cac xuc va doan vi ((lua tre) or (dua tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) OR (ly hang)) x ho. hieu ve cac xuc va doan vi ((lua tre) or (dua tren))*.