Perhaps you should try some spelling variations:
khach phat » khich phat, sach phat, cach phat
tong minh » thong minh, trong minh, song minh
sach cha » sach nha, sach che, sach ha
giai nam » giai nan, gian nam, giai bai
nam cong » nam cuong, nam dong, dam cong
vu khach » vu khanh, vu khac, vay khach
phat dan » hat dan, phan dang, pham dang
dan giai » dan gian, luan giai, va giai
giai han » giai san, giai phap, giai phau
tu sach » thu sach, su sach, te sach
me giai » de giai, ve giai, ke giai

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 cha me giai nam cong trinh ) or ( vu khach phat dan giai han tong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach cha me giai nam cong trinh ) OR ( vu khach phat dan giai han tong minh ))*.