Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
nam thuc » nam thuoc, am thuc, nam thu
hanh via » hanh vi, hanh va, anh va
hieu van » hieu va, thien van, lieu va
via cuu » via cua, vinh cuu
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, dam thuc
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach thue)) lang xa hoi. hieu van ((cam tuc) or (nam thuc)) va hanh via cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach thue)) lang xa hoi. hieu van ((cam tuc) OR (nam thuc)) va hanh via cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) or (sach thue)) lang xa hoi. hieu van ((cam tuc) or (nam thuc)) va hanh via cuu tre*.