Perhaps you should try some spelling variations:
tay lang » tai lang, tay tang, tay quang
doc sach » hoc sach, toc sach, nuoc sach
cham luc » cham soc, nhan luc, cham cuu
qua cham » qua hai, qua cac, va cham
te sach » toc sach
nang di » nang du, hang di, nang ji
va nang » van nang, da nang, cam nang
ty lang » ty xang, ty hang, tu lang
luc va » duc va, tuc va, loc va
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) or (doc sach)) ((ty lang) or (tay lang)) xa hoi. hieu qua cham luc va nang di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (doc sach)) ((ty lang) OR (tay lang)) xa hoi. hieu qua cham luc va nang di cua te.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (doc sach)) ((ty lang) or (tay lang)) xa hoi. hieu qua cham luc va nang di cua te*.