Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va dung » van dung, va duong, vat dung
dung co » dung cho, dung cong, dung cua
su sach » vu sach
c_ hai » co hai
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
co cau » bo cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky nang ((_ hai) or (c_ hai)). hieu va cam tuc va dung co cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang ((_ hai) OR (c_ hai)). hieu va cam tuc va dung co cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang ((_ hai) or (c_ hai)). hieu va cam tuc va dung co cau tren*.