Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cac toi » cac thoi
xa hang » va hang, xa bang, xa hung
hang di » hang doi, hang vi, hang dien
di cua » dai cua, doi cua, de cua
cua te » cua 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 cao hoi. hieu va ((cac toi) or (cac nuoc)) xa hang di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cao hoi. hieu va ((cac toi) OR (cac nuoc)) xa hang di cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang cao hoi. hieu va ((cac toi) or (cac nuoc)) xa hang di cua te*.