Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cau treo » cau theo, cau tren, cau triet
hanh tai » hang tai, han tai, hinh tai
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
sang ma » tang ma, nang ma, sang tao
sach ty » sach tu, sach thu, xach tay
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach y) or (sach ty)) sang ma hoi. hieu van cam tuc xa ((hanh tai) or (thanh tai)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) sang ma hoi. hieu van cam tuc xa ((hanh tai) OR (thanh tai)) cau treo.
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach ty)) sang ma hoi. hieu van cam tuc xa ((hanh tai) or (thanh tai)) cau treo*.