Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh lai » danh sai, gianh lai, dinh lam
hieu van » hieu va, thien van, lieu va
lam duc » lam duoc, pham duc, nam duoc
cuu tre » cua tre, cau treo
va danh » va dinh, va dan, va hanh
sach ty » sach tu, sach thu, xach tay
sang xa » song xa, lang xa, sang ma
van lam » van nam

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) or (sach y)) sang xa hoi. hieu van lam duc va danh lai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) sang xa hoi. hieu van lam duc va danh lai ((cuu tre) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach y)) sang xa hoi. hieu van lam duc va danh lai ((cuu tre) OR (cau tren))*".