Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac dac » cac dan, cac dai, cac bac
vat cua » mat cua, bat cua, hat cua
dat cua » dai cua, day cua, mat cua
dac va » duc va, day va, dat va
va dan » ca dan, va dao, va dau

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 (thu sach)) ky nang xa hoi. hieu qua cac dac va dan ((vat cua) or (dat cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu qua cac dac va dan ((vat cua) OR (dat cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. hieu qua cac dac va dan ((vat cua) or (dat cua)) triet*.