Perhaps you should try some spelling variations:
te sach » toc sach
doi cua » dai cua, hoi cua
qua cam » qua cham, qua cac, qua ca
di cua » dai cua, de cua, do cua
loc va » hoc va, luc va
sach v » sach va, sach y, sach 2
nang o » nang co, nang ho, nang ro
v nang » va nang, vu nang, van nang
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu qua cam ((loc va) or (tuc xa)) thanh ((di cua) or (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang o hoi. hieu qua cam ((loc va) OR (tuc xa)) thanh ((di cua) OR (doi cua)) te.
• Adding a wildcard symbol may retrieve word variants: te sach v nang o hoi. hieu qua cam ((loc va) or (tuc xa)) thanh ((di cua) or (doi cua)) te*.