Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
thanh do » thanh de, thanh pho, thanh hoa
thanh di » thanh doi, thanh de, thanh dinh
cam loc » cam lo
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) or (tu sach)) ky nang ma hoi. hieu ve cam loc va ((thanh di) or (thanh do)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (tu sach)) ky nang ma hoi. hieu ve cam loc va ((thanh di) OR (thanh do)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu khach) or (tu sach)) ky nang ma hoi. hieu ve cam loc va ((thanh di) or (thanh do)) cua tre*.