Perhaps you should try some spelling variations:
hieu thi » sieu thi, hieu chi, hiep thi
van hanh » van thanh, ban hanh, van anh
cham luc » cham soc, nhan luc, cham cuu
thu sach » thuat sach, thuoc sach, khau sach
tai lang » tai cong, thi lan, tai san
thi cham » thi hai, toc cham, thi ha
luc van » luoc van, luu van, duc van
lang xa » lang ha, dang xay, lang van
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu hoach) or (((tu sach) OR (thu sach)))) tai lang xa hoi. hieu thi cham luc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (((tu sach) OR (thu sach)))) tai lang xa hoi. hieu thi cham luc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu hoach) or (((tu sach) OR (thu sach)))) tai lang xa hoi. hieu thi cham luc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (((tu sach) OR (thu sach)))) tai lang xa hoi. hieu thi cham luc van hanh vi cua tre*.