Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
sach ky » sac ky, sach y, sach kem
tang xa » trang xa, tang ma, lang xa
sach ty » sach y, sach tu, sach thu
tuc va » thuc va, truc va, tuc xa
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: toc ((sach ky) OR (sach ty)) tang xa hoi. hieu van cam tuc va ((hanh tai) or (thanh tai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach ty)) tang xa hoi. hieu van cam tuc va ((hanh tai) OR (thanh tai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) OR (sach ty)) tang xa hoi. hieu van cam tuc va ((hanh tai) or (thanh tai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sach ty)) tang xa hoi. hieu van cam tuc va ((hanh tai) or (thanh tai)) cua tu*.