Perhaps you should try some spelling variations:
hanh diem » hanh dieu, thanh liem, chanh niem
te sach » toc sach
diem ha » liem ha, diem a, diem cau
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
ha tren » hoa tren, ha tran, la tren
cac tu » cac thu, cach tu, tac 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 xa) or (nang x)) hoi. hieu va ((cac tu) OR (cac du)) va hanh diem ha tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (nang x)) hoi. hieu va ((cac tu) OR (cac du)) va hanh diem ha tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (nang x)) hoi. hieu va ((cac tu) OR (cac du)) va hanh diem ha tren".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (nang x)) hoi. hieu va ((cac tu) OR (cac du)) va hanh diem ha tren*.