Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
sach v » sach va, sach y, sach 2
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
di cua » doi cua, de cua, do cua

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 v ((nang xa) or (nang ma)) hoi. hieu va cam luc va thanh ((di cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v ((nang xa) OR (nang ma)) hoi. hieu va cam luc va thanh ((di cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v ((nang xa) or (nang ma)) hoi. hieu va cam luc va thanh ((di cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach v ((nang xa) or (nang ma)) hoi. hieu va cam luc va thanh ((di cua) OR (dai cua)) tre*.