Perhaps you should try some spelling variations:
van luan » van quan, van tuan, von luan
hieu van » thien van, lieu va, hieu ve
cam luoc » cam xuc, tom luoc, dai luoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
cam lo » nam lo, cam ly, cam o

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 van) OR (hieu va)) ((cam luoc) or (cam lo)) van luan van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. ((hieu van) OR (hieu va)) ((cam luoc) OR (cam lo)) van luan van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. ((hieu van) OR (hieu va)) ((cam luoc) or (cam lo)) van luan van cua tre*".