Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
so sach » so sanh, bo sach, co sach
xuc van » duc van, luc van, vuc van
su cham » su pham, tu cham, vu cham
sach ty » sach y, sach tu, sach thu
hieu su » hieu sau, tieu su, hieu so
lang ha » long ha
nang xa » nang x, lang xa, nang ma
cu tren » tu tren, dua tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) or (lang ha)) hoi. hieu su cham xuc van hanh vi ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (lang ha)) hoi. hieu su cham xuc van hanh vi ((cau tren) OR (cu tren)).
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) or (lang ha)) hoi. hieu su cham xuc van hanh vi ((cau tren) or (cu tren))*.