Perhaps you should try some spelling variations:
thanh kem » hanh kem, thanh ke, thanh ket
dua tren » dung tren
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
ve cam » ve cham, ve cac, va cam

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 ky nang x ho. hieu ve cam ((luc van) OR (duc van)) thanh kem ((dua tren) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. hieu ve cam ((luc van) OR (duc van)) thanh kem ((dua tren) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x ho. hieu ve cam ((luc van) OR (duc van)) thanh kem ((dua tren) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. hieu ve cam ((luc van) OR (duc van)) thanh kem ((dua tren) or (cau treo))*.