Perhaps you should try some spelling variations:
thanh te » thanh ve, thanh de, thanh le
thanh va » thanh van, hanh va, thanh ha
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu va cham ((luc van) OR (duc van)) ((thanh te) or (thanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. hieu va cham ((luc van) OR (duc van)) ((thanh te) OR (thanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu va cham ((luc van) OR (duc van)) ((thanh te) or (thanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu va cham ((luc van) OR (duc van)) ((thanh te) or (thanh va)) cua tre*.