Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam thu » nam thu, cac thu, ca thu
va hanh » van hanh, va thanh, va danh
hanh bi » hanh vi, thanh bai, khanh bui
ma hoi » mai hoi, xa hoi, ma hoa
cam tu » nam tu, dam tu, tam tu

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 ma hoi. hieu va ((cam tu) or (cam thu)) va hanh bi dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu va ((cam tu) OR (cam thu)) va hanh bi dau tieng.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu va ((cam tu) or (cam thu)) va hanh bi dau tieng*.