Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luot van
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
luc van » luu van, duc van, luc va
cua tre » cua te, cuu tre, cua triet
le cua » ly cua

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