Perhaps you should try some spelling variations:
tan hanh » tan thanh, tang hanh, toan hanh
sach ty » sach y, sach thu, xach tay
vai cac » va cac, tai cac, voi cac
vai cay » va cay, vai gay, voi cay
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
sach tu » sach thu, cach tu, sach uu
ang xa » lang xa, mang xa, dang xay
ve cam » ve cham, ve cac, va cam

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 tu)) ang xa hoi. hieu ve cam duc tan hanh ((vai cay) OR (vai cac)) thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) ang xa hoi. hieu ve cam duc tan hanh ((vai cay) OR (vai cac)) thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach tu)) ang xa hoi. hieu ve cam duc tan hanh ((vai cay) OR (vai cac)) thuoc".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) ang xa hoi. hieu ve cam duc tan hanh ((vai cay) OR (vai cac)) thuoc*.