Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cam duc » cam xuc, cao duc, pham duc
dan vat » dang vat, van vat, dan va
vat cua » mat cua, bat cua, dat cua
va dan » ca dan, va dao, va dau
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((nang xa) or (nang ma)) hoi. ((lieu va) or (hieu qua)) cam duc va dan vat cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (nang ma)) hoi. ((lieu va) OR (hieu qua)) cam duc va dan vat cua tu.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (nang ma)) hoi. ((lieu va) or (hieu qua)) cam duc va dan vat cua tu*.