Perhaps you should try some spelling variations:
cac trieu » cac tieu, cau trieu, cac kieu
cao trieu » cau trieu, cao hieu, tan trieu
vanh tai » van tai, hanh tai, anh tai
va vanh » va van, va danh, va hanh
cam tuc » cam xuc, cam tu, nam thuc
sach ty » sach y, sach thu, xach tay
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
qua cam » qua cham, qua cac, qua ca
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach tu)) nang xa hoi. hieu qua cam tuc va vanh tai ((cao trieu) OR (cac trieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang xa hoi. hieu qua cam tuc va vanh tai ((cao trieu) OR (cac trieu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) nang xa hoi. hieu qua cam tuc va vanh tai ((cao trieu) OR (cac trieu))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang xa hoi. hieu qua cam tuc va vanh tai ((cao trieu) OR (cac trieu))*.