Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
cau tren » cu tren, dau tren, ca tren
dat tren » dat trong, dua tren
ky tang » ky dang, kho tang, ky trong
qua cao » qua cac, qua ca, qua cai
cao luc » bao luc, cao duc, cao suc
te ban » te bao
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: te ban ((ky tang) or (ky nang)) xa hoi. hieu qua cao luc va thanh va ((cau tren) or (dat tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ((ky tang) OR (ky nang)) xa hoi. hieu qua cao luc va thanh va ((cau tren) OR (dat tren)).
• Adding a wildcard symbol may retrieve word variants: te ban ((ky tang) or (ky nang)) xa hoi. hieu qua cao luc va thanh va ((cau tren) or (dat tren))*.