Perhaps you should try some spelling variations:
nang van » dang van, tang van, lang van
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
duc van » duc va, duc tan, duc manh
luc van » luoc van, luu van, luc va
cuc tre » duc tre, cua tre, cuu tre

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang van hoa. hieu qua cac ((duc van) or (luc van)) hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang van hoa. hieu qua cac ((duc van) OR (luc van)) hanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang van hoa. hieu qua cac ((duc van) or (luc van)) hanh tai cuc tre*.