Perhaps you should try some spelling variations:
tan nhanh » tai nhanh, tan nhan, tan thanh
sach hoi » sach doi, sach moi, cach thoi
hoi nang » hoi lang, ho nang, hoa nang
te sach » toc sach
thai va » thai van
thai ca » thai cua, thai cao, thai ha
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cai
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: te sach hoi nang xa hoi. hieu ((va cam) OR (va cao)) duc tan nhanh ((thai ca) or (thai va)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoi nang xa hoi. hieu ((va cam) OR (va cao)) duc tan nhanh ((thai ca) OR (thai va)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi nang xa hoi. hieu ((va cam) OR (va cao)) duc tan nhanh ((thai ca) or (thai va)) viet".
• Adding a wildcard symbol may retrieve word variants: te sach hoi nang xa hoi. hieu ((va cam) OR (va cao)) duc tan nhanh ((thai ca) or (thai va)) viet*.