Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
hanh hai » thanh hai, nhanh hai, hang hai
dua tren » dung tren
dai hai » dai han, dai hoi, dai tai
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
su cac » tu cac, su cao, su can
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
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: su cac ky nang dai hai. hieu ve cac tuc va hanh hai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang dai hai. hieu ve cac tuc va hanh hai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su cac ky nang dai hai. hieu ve cac tuc va hanh hai ((dua tren) or (cua te))*.