Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cau theo » cau thi, cau tao
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, 5 hoi

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 xang ((x hoi) or (x ho)). hieu va cam tuc xa hanh vi ((cau theo) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty xang ((x hoi) OR (x ho)). hieu va cam tuc xa hanh vi ((cau theo) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ty xang ((x hoi) or (x ho)). hieu va cam tuc xa hanh vi ((cau theo) or (cau tren))*.