Perhaps you should try some spelling variations:
kho tang » cao tang
su sach » so sach, vu sach
cao tuc » dao tuc, cao duc, cao suc
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
xa hanh » xa thanh, xa khanh, va hanh
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
va cao » va cac, va co, va dao

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 ((ky lang) or (kho tang)) xa hoi. hieu va cao tuc xa hanh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (kho tang)) xa hoi. hieu va cao tuc xa hanh ((vai cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (kho tang)) xa hoi. hieu va cao tuc xa hanh ((vai cua) or (hai cua)) tre*.