Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
sach ty » sach tu, sach thu, xach tay
hanh bi » hanh vi, thanh bai, khanh bui
truc va » thuc va, thuc vat, trung va
hieu va » lieu va, hieu qua
tuc va » thuc va, tuc xa, duc va
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) OR (sach y)) nang x hoi. hieu va cam ((tuc va) or (truc va)) hanh bi dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) nang x hoi. hieu va cam ((tuc va) OR (truc va)) hanh bi dau tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach y)) nang x hoi. hieu va cam ((tuc va) or (truc va)) hanh bi dau tieng".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach y)) nang x hoi. hieu va cam ((tuc va) or (truc va)) hanh bi dau tieng*.