Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thanh va » thanh van, hanh va, thanh ha
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc gia » luoc gia, duc gia, quoc gia
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau treo
te sach » toc sach
va cam » va cham, va cac, va cao
y lang » o lang, _ lang, tay lang

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