Perhaps you should try some spelling variations:
thanh lam » thanh lap, thanh nam, thanh tam
cham duc » pham duc, cham soc, pham duy
vu khach » vu khanh, vu khac, vay khach
hanh lam » thanh lap, hanh kem, hanh va
vu sach » vu bach, su sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tang ma » mang may, tang van
ty tang » tay tang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khach)) ty tang ma hoi. hieu vu cham duc va ((thanh lam) OR (hanh lam)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ty tang ma hoi. hieu vu cham duc va ((thanh lam) OR (hanh lam)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) ty tang ma hoi. hieu vu cham duc va ((thanh lam) OR (hanh lam)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khach)) ty tang ma hoi. hieu vu cham duc va ((thanh lam) OR (hanh lam)) cuu tre*.