Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
dua tren » dung tren
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
ky sang » ky nang, ky dang, duy sang
hieu ve » hieu va, hieu van
dai hoi » dai hoc, dai hai, dai moi
ky tang » ky nang, ky dang, kho tang
cao suc » cao su, cao duc
suc va » duc va, tuc va, luc va
ve cao » va cao, ve bao, ve cac

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 sang) or (ky tang)) dai hoi. hieu ve cao suc va thanh vai ((cau tren) or (dua tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ((ky sang) OR (ky tang)) dai hoi. hieu ve cao suc va thanh vai ((cau tren) OR (dua tren)).
• Adding a wildcard symbol may retrieve word variants: tu cac ((ky sang) or (ky tang)) dai hoi. hieu ve cao suc va thanh vai ((cau tren) or (dua tren))*.