Perhaps you should try some spelling variations:
kham tuc » nham thuc, pham thuc, kham cuoc
thu sac » thu sach, thu san, thu xac
va nang » van nang, da nang, cam nang
xa nang » da nang, xa nong, ca nang
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sac ky » cac ky, sai ky
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: thu sac ky ((nang xa) or (nang ma)) hoi. hieu vu kham tuc ((xa nang) OR (va nang)) dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang xa) OR (nang ma)) hoi. hieu vu kham tuc ((xa nang) OR (va nang)) dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky ((nang xa) or (nang ma)) hoi. hieu vu kham tuc ((xa nang) OR (va nang)) dai cua tu".
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang xa) or (nang ma)) hoi. hieu vu kham tuc ((xa nang) OR (va nang)) dai cua tu*.