Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
nam thuc » nam thuoc, am thuc, nam thu
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
ky lang » ky dang, ky tang, tay lang
hieu ha » hieu hoa, hieu va, hieu ca
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh

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

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