Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
tu cach » tu cac
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
dan anh » dan canh, dan hanh, lan anh
van anh » van thanh, tuan anh, van minh
va nam » van nam, ha nam, va nay
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang xa hoi. hieu va nam thuc ((dan anh) OR (van anh)) dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang xa hoi. hieu va nam thuc ((dan anh) OR (van anh)) dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang xa hoi. hieu va nam thuc ((dan anh) OR (van anh)) dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang xa hoi. hieu va nam thuc ((dan anh) OR (van anh)) dai cua te*.