Perhaps you should try some spelling variations:
dong cua » dung cua, cong cua, huong cua
te sach » toc sach
doi cua » dai cua, hoi cua
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
sach v » sach va, sach y, sach 2
va cam » va cham, va cac, va cao
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 va cam ((luc va) or (tuc va)) thanh ((doi cua) OR (dong cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang o hoi. hieu va cam ((luc va) OR (tuc va)) thanh ((doi cua) OR (dong cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang o hoi. hieu va cam ((luc va) or (tuc va)) thanh ((doi cua) OR (dong cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach v nang o hoi. hieu va cam ((luc va) or (tuc va)) thanh ((doi cua) OR (dong cua)) te*.