Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
chau tho » chat thom, cau thi, phu tho
nam thuc » nam thuoc, am thuc, nam thu
chau tre » chay tren, cho tre, cau tra
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve nam » he nam, va nam, le nam

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 (thuat san)) ky nang xa hoi. hieu ve nam thuc va hanh lai ((chau tre) OR (chau tho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat san)) ky nang xa hoi. hieu ve nam thuc va hanh lai ((chau tre) OR (chau tho)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thuat san)) ky nang xa hoi. hieu ve nam thuc va hanh lai ((chau tre) OR (chau tho))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat san)) ky nang xa hoi. hieu ve nam thuc va hanh lai ((chau tre) OR (chau tho))*.