Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
sinh dai » sinh thai, si dai, sinh vat
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa

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