Perhaps you should try some spelling variations:
dat khanh » van khanh, duy khanh
dat thanh » dao thanh, dang thanh, danh thanh
cau tren » cu tren, dau tren, ca tren
nam thuc » nam thuoc, am thuc, nam thu
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
tu sach » thu sach, su sach, te sach
va nam » van nam, ha nam, va nay
vi cau » va cau, ve cau, di cau

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) or (so sanh)) ky nang xa hoi. lieu va nam thuc ((dat thanh) or (dat khanh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sanh)) ky nang xa hoi. lieu va nam thuc ((dat thanh) OR (dat khanh)) vi cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sanh)) ky nang xa hoi. lieu va nam thuc ((dat thanh) or (dat khanh)) vi cau tren*.