Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van doan » van doanh, van toan, van dan
van hoan » van hoang, van hoa, van toan
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
dan cua » dan ca, ban cua, dai cua
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y lang xa hoi. hieu ve cham luc ((van doan) or (van hoan)) dan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu ve cham luc ((van doan) OR (van hoan)) dan cua tre*.