Perhaps you should try some spelling variations:
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
cac tac » cac toc, cac bac, cac dac
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac nuoc
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
va cua » va chua, via cua, ca cua
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 ((hanh kem) or (sac ky)) nang ma hoi. hieu va ((cac tuc) or (cac tac)) va tinh va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((hanh kem) OR (sac ky)) nang ma hoi. hieu va ((cac tuc) OR (cac tac)) va tinh va cua tu.
• Adding a wildcard symbol may retrieve word variants: thuat ((hanh kem) or (sac ky)) nang ma hoi. hieu va ((cac tuc) or (cac tac)) va tinh va cua tu*.