Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
dua tren » dung tren
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty tang » tay tang, ty xang, ty hang
tang xa » trang xa, tang ma, lang xa
qua cam » qua cham, qua cac, qua ca
cam duc » cam xuc, cao duc, pham duc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty tang xa hoi. hieu qua cam duc tan hanh vi ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty tang xa hoi. hieu qua cam duc tan hanh vi ((dua tren) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty tang xa hoi. hieu qua cam duc tan hanh vi ((dua tren) or (cau treo))*.