Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, ca tren, cau treo
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
dau tren » dau tien, dat tren, dau tieng
va cham » va tham
va chat » van chat, va phat, cao chat
nang ro » nang co, nang ho, nang ra
sach v » sach va, sach y, sach 2
ro hoi » co hoi, o hoi, mo hoi
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v nang ro hoi. lieu ((va cham) OR (va chat)) hoc va trinh vi ((cau tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang ro hoi. lieu ((va cham) OR (va chat)) hoc va trinh vi ((cau tren) OR (dau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach v nang ro hoi. lieu ((va cham) OR (va chat)) hoc va trinh vi ((cau tren) or (dau tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach v nang ro hoi. lieu ((va cham) OR (va chat)) hoc va trinh vi ((cau tren) or (dau tren))*.