Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
hanh bi » hanh vi, thanh bai, khanh bui
truc va » thuc va, thuc vat, trung va
sach ty » sach y, sach tu, sach thu
te sach » toc sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
tuc va » thuc va, tuc xa, duc va

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 ((nang xa) OR (nang ma)) 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 ((nang xa) OR (nang ma)) 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 ((nang xa) OR (nang ma)) hoi. hieu va cam ((tuc va) or (truc va)) hanh bi dau tieng".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) OR (nang ma)) hoi. hieu va cam ((tuc va) or (truc va)) hanh bi dau tieng*.